When I had my parts replaced under warranty in 2018, it was going from max-min in about 4 or 5 months (basically between oil changes).
Thank you for the reassurance, I'll top it up and then monitor it.
7
Thermostat housing and water pump fail.
- Thread starter Terrafirma10
- Start date
When I had my parts replaced under warranty in 2018, it was going from max-min in about 4 or 5 months (basically between oil changes).
Thank you for the reassurance, I'll top it up and then monitor it.
Golfs everyday
Autocross Newbie
- Location
- USA
Also note that when temperatures fall the coolant level will drop as well.
I would not worry and just add distilled water or additional coolant. I remember my GTI's coolant dropped right about that min line during cold season and I just kept adding more VW coolant. It wasn't significant enough to consider it a leak.
I would not worry and just add distilled water or additional coolant. I remember my GTI's coolant dropped right about that min line during cold season and I just kept adding more VW coolant. It wasn't significant enough to consider it a leak.
anotero
Autocross Champion
- Location
- Hither and thither
- Car(s)
- Mk7 GTI
How much of the water-coolant mixture do I need to refill after replacing the thermostat?
Al_in_Philly
Autocross Newbie
- Location
- Philadelphia USA
Rommies
New member
- Location
- South-Africa, Johannesburg
Just letting you guys know - it's about 1 year later (less than 10 000miles) and my thermostat housing is leaking again....(Part no 06L 121 111M)
This is a real terrible design flaw from Volkswagen!!
This is a real terrible design flaw from Volkswagen!!
That sounds more like an installation error if less than 10k miles or it's the water pump leaking now. My car has been on both extremes of the weather spectrum and it doesn't leak. Been on for 2 years and sitting at 25-30k miles
aloha_from_bradley
Autocross Champion
- Location
- AZ
I'm in Phoenix. Brutal summers. My car has been through 2 of them so far.
For what it's worth, I had my water pump & thermo housing done at 17k.
Seems to be okay so far.
For what it's worth, I had my water pump & thermo housing done at 17k.
Seems to be okay so far.
Had mine replaced under warranty with 40k in March 2019.
I’m now at 62k miles and leaking again. Slowly, but the light will come on. I’ve never seen the thermostat move from the middle. I’m going to have it replaced again, unfortunately I’m outside warranty so I’ll need to pay this time.
Dealer back then installed 06L-121-111-K.Shop now is ordering -M. So, hopefully they’ve fixed it
I’m now at 62k miles and leaking again. Slowly, but the light will come on. I’ve never seen the thermostat move from the middle. I’m going to have it replaced again, unfortunately I’m outside warranty so I’ll need to pay this time.
Dealer back then installed 06L-121-111-K.Shop now is ordering -M. So, hopefully they’ve fixed it
Curious what is the going rates for an independent mechanic to do this work? I just did this job myself. But could not remove the pump drive-belt, not that you have to, but because I wanted to. Anyway, left the pump drive-belt on and changed pump and housing and union fitting. Wasn't that simple b/c alot of the work was removing the intake to gain better access. I hope it doesn't leak again.Had mine replaced under warranty with 40k in March 2019.
I’m now at 62k miles and leaking again. Slowly, but the light will come on. I’ve never seen the thermostat move from the middle. I’m going to have it replaced again, unfortunately I’m outside warranty so I’ll need to pay this time.
Dealer back then installed 06L-121-111-K.Shop now is ordering -M. So, hopefully they’ve fixed it
83 GTI, 93 Corrado, same issue. Some things never change.
jimlloyd40
Autocross Champion
- Location
- Phoenix
- Car(s)
- 2018 SE DSG
The water temperature will always read 194* unless it seriously overheats. Check it out. Once the engine is up to temperature it will show 194.Had mine replaced under warranty with 40k in March 2019.
I’m now at 62k miles and leaking again. Slowly, but the light will come on. I’ve never seen the thermostat move from the middle. I’m going to have it replaced again, unfortunately I’m outside warranty so I’ll need to pay this time.
Dealer back then installed 06L-121-111-K.Shop now is ordering -M. So, hopefully they’ve fixed it
HalfGerman
Go Kart Newbie
- Location
- NH
- Car(s)
- 2018 Golf R
There is a German company making an upgraded water pump, of course cannot remember the name or find it. 
HalfGerman
Go Kart Newbie
- Location
- NH
- Car(s)
- 2018 Golf R
How is that fixing the actual problem? Looks like it's just a low temp thermostat (which most people don't need) and an aftermarket impeller.